Unfortunately, CEGUI makes use of the GLEW library and many OpenGL extensions. The GLEW library does not support OpenGL ES, nor do many of the extensions used by CEGUI. Because of this, CEGUI would require major modifications to be sucessfully ported to Android. This is not a job for me, but someone who actually helps maintain CEGUI.
The PCRE library was, however, successfully ported and I will upload it the minute I get a chance.